Portable gbist-mill



1 s.sHELD0N.

l `Grist Mill. No. 11,681. i Patented Sept. 12, 1854.

UNITED STATES PATENT OFFICE.

SAMUEL SHELDON, OF CINCINNATI, OHIO.

PORTABLE GRIST-MILL.

Specification of Letters Patent No.

To aZZ 'whomz't may concern:

Be it known that I, SAMUEL SHELDON, of Cincinnati, in the county of I-Iamilton and State of Ohio, have invented a new and useful Improvement in Portable Grist-Mills and I do hereby declare that the following is a full, clear, and eXact description of the construction and operation of the same, reference being had to the annexed drawing, forming part of this specification, in which- Figure 1 is a vertical longitudinal section of the mill, taken through the aXis of the shaft. F ig. 2 is an edge view of the plate holding stationary stone, showing the slotted flangesk for adjusting said stone.

Similar characters of reference in the several figures denote the same part of the mill.

My invention which refers to those mills whose stones have horizontal a'Xes and are held by flanges around their edges consist-s in secu-ring on an upright plate, having slotted flanges on its vertical edges, for regulating the face of the stationary stone so as to be parallel to the furrowed face of the runner as will be hereafter fully set forth.

To enable others skilled in the art to make and use my invention I will proceed to describe its construction and operation.

In the drawing A is the runner and B the stationary stone, the former secured -in the flanged head C by a suitable number of pins a passing through the flange Z) the said head C being cast with the shaft D and therefore capable of running with the utmost accuracy by the proper journaling of the shaft. The stationary stone B is secured to the flanged plate E by pins c passing through the flange e, the plate being held upright and adjusted so as to bring the cutting face of the stone B parallel to the opposite face of the runner, by means of the bolts passing through the horizontal slots Z in the flange F of the plate E, and connecting the plate l"with the frame of the mill. In the hub H of the head C is inserted a pin p, extending into the eye of the stationary stone, for feeding the grain. Several holes are made in the hub, at various angles, so that by the insertion of the pin p in the proper hole, any desired rapidity of feed may be insured: the greater the inclination of the pin p to the aXis of the shaft, the greater being the rapidity of feed.

I is the hopper, having a sliding bottom f movable in the groove g, and secured at any desired point, by a screw s, for regu- 11,681, dated September 12, 1854.

lating the amount of grain passed to the stones.

In the journal boX R is a small square bar of hardened steel m, capable of sliding longitudinally; it rests against the steel point n in the end of the shaft D, and is capable of being pressed upon by the screw Z, so as to move the shaft D longitudinally to regulate the distance between the stones. The bar m is used so that t-he rotation of the shaft may not work the screw Z loose: as would obtain if the screw pressed directly against .the shaft.

Motion is communicated to the shaft D by means of a pulley P connected with any suitable power.

The operation of the above described mill is as follows. The space between the stones is regulated by the screw Z as above set forth,

and the pin p so placed as to have the proper inclination for feeding; the slide s being also adjusted so as to admit the necessary quantity of grain. It should be mentioned that before the foregoing adjustments, the plate E must be so regulated by means of bolts through the slots Z as to bring the stationary stone parallel to the face of the runner. After properly adjusting the several parts of the mill motion is communicated to the runner and the grain ground as in ordinary mills of this character. The advantages of this mill consist in simplicity of construction. ease of adjustment and durability, the runners being secured in t-he flanged head and the shaft perfectly journaled, the stationary stone has only to be made parallel to the face of the runner, by

means of the slots CZ, and the stone is in running condition.

I do not claim the securing of the stones in flanged heads or cups, as such has been done before; but

What I do claim, is securing the stationary stone to an upright flanged plate E, and the ad'ustment of said plate by means of slotted anges and bolts, for insuring in a simple and effectual manner the parallelism of the faces of the stones as herein before set forth when the same is applied to a mill in which the axis of revolution of the running stone is horizontal.

In testimony whereof, I have hereunto signed my name before two subscribing wit- 

